/* -----------------------------------------------
/* Author : Vincent Garreau  - vincentgarreau.com
/* MIT license: http://opensource.org/licenses/MIT
/* Demo / Generator : vincentgarreau.com/particles.js
/* GitHub : github.com/VincentGarreau/particles.js
/* How to use? : Check the GitHub README
/* v2.0.0
/* ----------------------------------------------- */

var pJS = function (tag_id, params) {
    // var canvas_el = document.querySelector('#' + tag_id + ' > .particles-js-canvas-el');
    var canvas_el = tag_id.querySelector('.particles-js-canvas-el')

    /* particles.js variables with default values */
    this.pJS = {
        canvas: {
            el: canvas_el,
            w: canvas_el.offsetWidth,
            h: canvas_el.offsetHeight
        },
        particles: {
            number: {
                value: 400,
                density: {
                    enable: true,
                    value_area: 800
                }
            },
            color: {
                value: '#fff'
            },
            shape: {
                type: 'circle',
                stroke: {
                    width: 0,
                    color: '#ff0000'
                },
                polygon: {
                    nb_sides: 5
                },
                image: {
                    src: '',
                    width: 100,
                    height: 100
                }
            },
            opacity: {
                value: 1,
                random: false,
                anim: {
                    enable: false,
                    speed: 2,
                    opacity_min: 0,
                    sync: false
                }
            },
            size: {
                value: 20,
                random: false,
                anim: {
                    enable: false,
                    speed: 20,
                    size_min: 0,
                    sync: false
                }
            },
            line_linked: {
                enable: true,
                distance: 100,
                color: '#fff',
                opacity: 1,
                width: 1
            },
            move: {
                enable: true,
                speed: 2,
                direction: 'none',
                random: false,
                straight: false,
                out_mode: 'out',
                bounce: false,
                attract: {
                    enable: false,
                    rotateX: 3000,
                    rotateY: 3000
                }
            },
            array: []
        },
        interactivity: {
            detect_on: 'canvas',
            events: {
                onhover: {
                    enable: true,
                    mode: 'grab'
                },
                onclick: {
                    enable: true,
                    mode: 'push'
                },
                resize: true
            },
            modes: {
                grab: {
                    distance: 100,
                    line_linked: {
                        opacity: 1
                    }
                },
                bubble: {
                    distance: 200,
                    size: 80,
                    duration: 0.4
                },
                repulse: {
                    distance: 200,
                    duration: 0.4
                },
                push: {
                    particles_nb: 4
                },
                remove: {
                    particles_nb: 2
                }
            },
            mouse: {}
        },
        retina_detect: false,
        fn: {
            interact: {},
            modes: {},
            vendors: {}
        },
        tmp: {}
    }

    var pJS = this.pJS

    /* params settings */
    if (params) {
        Object.deepExtend(pJS, params)
        // console.log(pJS)
    }
    // console.log(Object.freeze(pJS))
    pJS.tmp.obj = {
        size_value: pJS.particles.size.value,
        size_anim_speed: pJS.particles.size.anim.speed,
        move_speed: pJS.particles.move.speed,
        line_linked_distance: pJS.particles.line_linked.distance,
        line_linked_width: pJS.particles.line_linked.width,
        mode_grab_distance: pJS.interactivity.modes.grab.distance,
        mode_bubble_distance: pJS.interactivity.modes.bubble.distance,
        mode_bubble_size: pJS.interactivity.modes.bubble.size,
        mode_repulse_distance: pJS.interactivity.modes.repulse.distance
    }

    pJS.fn.retinaInit = function () {
        if (pJS.retina_detect && window.devicePixelRatio > 1) {
            pJS.canvas.pxratio = window.devicePixelRatio
            pJS.tmp.retina = true
        } else {
            pJS.canvas.pxratio = 1
            pJS.tmp.retina = false
        }

        pJS.canvas.w = pJS.canvas.el.offsetWidth * pJS.canvas.pxratio
        pJS.canvas.h = pJS.canvas.el.offsetHeight * pJS.canvas.pxratio

        pJS.particles.size.value = pJS.tmp.obj.size_value * pJS.canvas.pxratio
        pJS.particles.size.anim.speed = pJS.tmp.obj.size_anim_speed * pJS.canvas.pxratio
        pJS.particles.move.speed = pJS.tmp.obj.move_speed * pJS.canvas.pxratio
        pJS.particles.line_linked.distance = pJS.tmp.obj.line_linked_distance * pJS.canvas.pxratio
        pJS.interactivity.modes.grab.distance = pJS.tmp.obj.mode_grab_distance * pJS.canvas.pxratio
        pJS.interactivity.modes.bubble.distance = pJS.tmp.obj.mode_bubble_distance * pJS.canvas.pxratio
        pJS.particles.line_linked.width = pJS.tmp.obj.line_linked_width * pJS.canvas.pxratio
        pJS.interactivity.modes.bubble.size = pJS.tmp.obj.mode_bubble_size * pJS.canvas.pxratio
        pJS.interactivity.modes.repulse.distance = pJS.tmp.obj.mode_repulse_distance * pJS.canvas.pxratio
    }

    /* ---------- pJS functions - canvas ------------ */

    pJS.fn.canvasInit = function () {
        pJS.canvas.ctx = pJS.canvas.el.getContext('2d')
    }

    pJS.fn.canvasSize = function () {
        pJS.canvas.el.width = pJS.canvas.w
        pJS.canvas.el.height = pJS.canvas.h

        if (pJS && pJS.interactivity.events.resize) {
            window.addEventListener('resize', function () {
                pJS.canvas.w = pJS.canvas.el.offsetWidth
                pJS.canvas.h = pJS.canvas.el.offsetHeight

                /* resize canvas */
                if (pJS.tmp.retina) {
                    pJS.canvas.w *= pJS.canvas.pxratio
                    pJS.canvas.h *= pJS.canvas.pxratio
                }

                pJS.canvas.el.width = pJS.canvas.w
                pJS.canvas.el.height = pJS.canvas.h

                /* repaint canvas on anim disabled */
                if (!pJS.particles.move.enable) {
                    pJS.fn.particlesEmpty()
                    pJS.fn.particlesCreate()
                    pJS.fn.particlesDraw()
                    pJS.fn.vendors.densityAutoParticles()
                }

                /* density particles enabled */
                pJS.fn.vendors.densityAutoParticles()
            })
        }
    }

    pJS.fn.canvasPaint = function () {
        pJS.canvas.ctx.fillRect(0, 0, pJS.canvas.w, pJS.canvas.h)
    }

    pJS.fn.canvasClear = function () {
        pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h)
    }

    /* --------- pJS functions - particles ----------- */

    pJS.fn.particle = function (color, opacity, position) {
        /* size */
        this.radius = (pJS.particles.size.random ? Math.random() : 1) * pJS.particles.size.value
        if (pJS.particles.size.anim.enable) {
            this.size_status = false
            this.vs = pJS.particles.size.anim.speed / 100
            if (!pJS.particles.size.anim.sync) {
                this.vs = this.vs * Math.random()
            }
        }

        /* position */
        this.x = position ? position.x : Math.random() * pJS.canvas.w
        this.y = position ? position.y : Math.random() * pJS.canvas.h

        /* check position  - into the canvas */
        if (this.x > pJS.canvas.w - this.radius * 2) this.x = this.x - this.radius
        else if (this.x < this.radius * 2) this.x = this.x + this.radius
        if (this.y > pJS.canvas.h - this.radius * 2) this.y = this.y - this.radius
        else if (this.y < this.radius * 2) this.y = this.y + this.radius

        /* check position - avoid overlap */
        if (pJS.particles.move.bounce) {
            pJS.fn.vendors.checkOverlap(this, position)
        }

        /* color */
        this.color = {}
        if (typeof (color.value) === 'object') {
            if (color.value instanceof Array) {
                var color_selected = color.value[Math.floor(Math.random() * pJS.particles.color.value.length)]
                this.color.rgb = hexToRgb(color_selected)
            } else {
                if (color.value.r != undefined && color.value.g != undefined && color.value.b != undefined) {
                    this.color.rgb = {
                        r: color.value.r,
                        g: color.value.g,
                        b: color.value.b
                    }
                }
                if (color.value.h != undefined && color.value.s != undefined && color.value.l != undefined) {
                    this.color.hsl = {
                        h: color.value.h,
                        s: color.value.s,
                        l: color.value.l
                    }
                }
            }
        } else if (color.value == 'random') {
            this.color.rgb = {
                r: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
                g: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
                b: (Math.floor(Math.random() * (255 - 0 + 1)) + 0)
            }
        } else if (typeof (color.value) === 'string') {
            this.color = color
            this.color.rgb = hexToRgb(this.color.value)
        }

        /* opacity */
        this.opacity = (pJS.particles.opacity.random ? Math.random() : 1) * pJS.particles.opacity.value
        if (pJS.particles.opacity.anim.enable) {
            this.opacity_status = false
            this.vo = pJS.particles.opacity.anim.speed / 100
            if (!pJS.particles.opacity.anim.sync) {
                this.vo = this.vo * Math.random()
            }
        }

        /* animation - velocity for speed */
        var velbase = {}
        switch (pJS.particles.move.direction) {
            case 'top':
                velbase = { x: 0, y: -1 }
                break
            case 'top-right':
                velbase = { x: 0.5, y: -0.5 }
                break
            case 'right':
                velbase = { x: 1, y: -0 }
                break
            case 'bottom-right':
                velbase = { x: 0.5, y: 0.5 }
                break
            case 'bottom':
                velbase = { x: 0, y: 1 }
                break
            case 'bottom-left':
                velbase = { x: -0.5, y: 1 }
                break
            case 'left':
                velbase = { x: -1, y: 0 }
                break
            case 'top-left':
                velbase = { x: -0.5, y: -0.5 }
                break
            default:
                velbase = { x: 0, y: 0 }
                break
        }

        if (pJS.particles.move.straight) {
            this.vx = velbase.x
            this.vy = velbase.y
            if (pJS.particles.move.random) {
                this.vx = this.vx * (Math.random())
                this.vy = this.vy * (Math.random())
            }
        } else {
            this.vx = velbase.x + Math.random() - 0.5
            this.vy = velbase.y + Math.random() - 0.5
        }

        this.vx_i = this.vx
        this.vy_i = this.vy

        /* if shape is image */

        var shape_type = pJS.particles.shape.type
        if (typeof (shape_type) === 'object') {
            if (shape_type instanceof Array) {
                var shape_selected = shape_type[Math.floor(Math.random() * shape_type.length)]
                this.shape = shape_selected
            }
        } else {
            this.shape = shape_type
        }

        if (this.shape == 'image') {
            var sh = pJS.particles.shape
            this.img = {
                src: sh.image.src,
                ratio: sh.image.width / sh.image.height
            }
            if (!this.img.ratio) this.img.ratio = 1
            if (pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg != undefined) {
                pJS.fn.vendors.createSvgImg(this)
                if (pJS.tmp.pushing) {
                    this.img.loaded = false
                }
            }
        }
    }

    pJS.fn.particle.prototype.draw = function () {
        var p = this

        if (p.radius_bubble != undefined) {
            var radius = p.radius_bubble
        } else {
            var radius = p.radius
        }

        if (p.opacity_bubble != undefined) {
            var opacity = p.opacity_bubble
        } else {
            var opacity = p.opacity
        }

        if (p.color.rgb) {
            var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + opacity + ')'
        } else {
            var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + opacity + ')'
        }

        pJS.canvas.ctx.fillStyle = color_value
        pJS.canvas.ctx.beginPath()

        switch (p.shape) {
            case 'circle':
                pJS.canvas.ctx.arc(p.x, p.y, radius, 0, Math.PI * 2, false)
                break

            case 'edge':
                pJS.canvas.ctx.rect(p.x - radius, p.y - radius, radius * 2, radius * 2)
                break

            case 'triangle':
                pJS.fn.vendors.drawShape(pJS.canvas.ctx, p.x - radius, p.y + radius / 1.66, radius * 2, 3, 2)
                break

            case 'polygon':
                pJS.fn.vendors.drawShape(
                    pJS.canvas.ctx,
                    p.x - radius / (pJS.particles.shape.polygon.nb_sides / 3.5), // startX
                    p.y - radius / (2.66 / 3.5), // startY
                    radius * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
                    pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
                    1 // sideCountDenominator
                )
                break

            case 'star':
                pJS.fn.vendors.drawShape(
                    pJS.canvas.ctx,
                    p.x - radius * 2 / (pJS.particles.shape.polygon.nb_sides / 4), // startX
                    p.y - radius / (2 * 2.66 / 3.5), // startY
                    radius * 2 * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
                    pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
                    2 // sideCountDenominator
                )
                break

            case 'image':

                function draw() {
                    pJS.canvas.ctx.drawImage(
                        img_obj,
                        p.x - radius,
                        p.y - radius,
                        radius * 2,
                        radius * 2 / p.img.ratio
                    )
                }

                if (pJS.tmp.img_type == 'svg') {
                    var img_obj = p.img.obj
                } else {
                    var img_obj = pJS.tmp.img_obj
                }

                if (img_obj) {
                    draw()
                }

                break
        }

        pJS.canvas.ctx.closePath()

        if (pJS.particles.shape.stroke.width > 0) {
            pJS.canvas.ctx.strokeStyle = pJS.particles.shape.stroke.color
            pJS.canvas.ctx.lineWidth = pJS.particles.shape.stroke.width
            pJS.canvas.ctx.stroke()
        }

        pJS.canvas.ctx.fill()
    }

    pJS.fn.particlesCreate = function () {
        for (var i = 0; i < pJS.particles.number.value; i++) {
            pJS.particles.array.push(new pJS.fn.particle(pJS.particles.color, pJS.particles.opacity.value))
        }
    }

    pJS.fn.particlesUpdate = function () {
        for (var i = 0; i < pJS.particles.array.length; i++) {
            /* the particle */
            var p = pJS.particles.array[i]

            /* move the particle */
            if (pJS.particles.move.enable) {
                var ms = pJS.particles.move.speed / 2
                p.x += p.vx * ms
                p.y += p.vy * ms
            }

            /* change opacity status */
            if (pJS.particles.opacity.anim.enable) {
                if (p.opacity_status == true) {
                    if (p.opacity >= pJS.particles.opacity.value) p.opacity_status = false
                    p.opacity += p.vo
                } else {
                    if (p.opacity <= pJS.particles.opacity.anim.opacity_min) p.opacity_status = true
                    p.opacity -= p.vo
                }
                if (p.opacity < 0) p.opacity = 0
            }

            /* change size */
            if (pJS.particles.size.anim.enable) {
                if (p.size_status == true) {
                    if (p.radius >= pJS.particles.size.value) p.size_status = false
                    p.radius += p.vs
                } else {
                    if (p.radius <= pJS.particles.size.anim.size_min) p.size_status = true
                    p.radius -= p.vs
                }
                if (p.radius < 0) p.radius = 0
            }

            /* change particle position if it is out of canvas */
            if (pJS.particles.move.out_mode == 'bounce') {
                var new_pos = {
                    x_left: p.radius,
                    x_right: pJS.canvas.w,
                    y_top: p.radius,
                    y_bottom: pJS.canvas.h
                }
            } else {
                var new_pos = {
                    x_left: -p.radius,
                    x_right: pJS.canvas.w + p.radius,
                    y_top: -p.radius,
                    y_bottom: pJS.canvas.h + p.radius
                }
            }

            if (p.x - p.radius > pJS.canvas.w) {
                p.x = new_pos.x_left
                p.y = Math.random() * pJS.canvas.h
            } else if (p.x + p.radius < 0) {
                p.x = new_pos.x_right
                p.y = Math.random() * pJS.canvas.h
            }
            if (p.y - p.radius > pJS.canvas.h) {
                p.y = new_pos.y_top
                p.x = Math.random() * pJS.canvas.w
            } else if (p.y + p.radius < 0) {
                p.y = new_pos.y_bottom
                p.x = Math.random() * pJS.canvas.w
            }

            /* out of canvas modes */
            switch (pJS.particles.move.out_mode) {
                case 'bounce':
                    if (p.x + p.radius > pJS.canvas.w) p.vx = -p.vx
                    else if (p.x - p.radius < 0) p.vx = -p.vx
                    if (p.y + p.radius > pJS.canvas.h) p.vy = -p.vy
                    else if (p.y - p.radius < 0) p.vy = -p.vy
                    break
            }

            /* events */
            if (isInArray('grab', pJS.interactivity.events.onhover.mode)) {
                pJS.fn.modes.grabParticle(p)
            }

            if (isInArray('bubble', pJS.interactivity.events.onhover.mode) || isInArray('bubble', pJS.interactivity.events.onclick.mode)) {
                pJS.fn.modes.bubbleParticle(p)
            }

            if (isInArray('repulse', pJS.interactivity.events.onhover.mode) || isInArray('repulse', pJS.interactivity.events.onclick.mode)) {
                pJS.fn.modes.repulseParticle(p)
            }

            /* interaction auto between particles */
            if (pJS.particles.line_linked.enable || pJS.particles.move.attract.enable) {
                for (var j = i + 1; j < pJS.particles.array.length; j++) {
                    var p2 = pJS.particles.array[j]

                    /* link particles */
                    if (pJS.particles.line_linked.enable) {
                        pJS.fn.interact.linkParticles(p, p2)
                    }

                    /* attract particles */
                    if (pJS.particles.move.attract.enable) {
                        pJS.fn.interact.attractParticles(p, p2)
                    }

                    /* bounce particles */
                    if (pJS.particles.move.bounce) {
                        pJS.fn.interact.bounceParticles(p, p2)
                    }
                }
            }
        }
    }

    pJS.fn.particlesDraw = function () {
        /* clear canvas */
        pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h)

        /* update each particles param */
        pJS.fn.particlesUpdate()

        /* draw each particle */
        for (var i = 0; i < pJS.particles.array.length; i++) {
            var p = pJS.particles.array[i]
            p.draw()
        }
    }

    pJS.fn.particlesEmpty = function () {
        pJS.particles.array = []
    }

    pJS.fn.particlesRefresh = function () {
        /* init all */
        cancelRequestAnimFrame(pJS.fn.checkAnimFrame)
        cancelRequestAnimFrame(pJS.fn.drawAnimFrame)
        pJS.tmp.source_svg = undefined
        pJS.tmp.img_obj = undefined
        pJS.tmp.count_svg = 0
        pJS.fn.particlesEmpty()
        pJS.fn.canvasClear()

        /* restart */
        pJS.fn.vendors.start()
    }

    /* ---------- pJS functions - particles interaction ------------ */

    pJS.fn.interact.linkParticles = function (p1, p2) {
        var dx = p1.x - p2.x
        var dy = p1.y - p2.y
        var dist = Math.sqrt(dx * dx + dy * dy)

        /* draw a line between p1 and p2 if the distance between them is under the config distance */
        if (dist <= pJS.particles.line_linked.distance) {
            var opacity_line = pJS.particles.line_linked.opacity - (dist / (1 / pJS.particles.line_linked.opacity)) / pJS.particles.line_linked.distance

            if (opacity_line > 0) {
                /* style */
                var color_line = pJS.particles.line_linked.color_rgb_line
                pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')'
                pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width
                // pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

                /* path */
                pJS.canvas.ctx.beginPath()
                pJS.canvas.ctx.moveTo(p1.x, p1.y)
                pJS.canvas.ctx.lineTo(p2.x, p2.y)
                pJS.canvas.ctx.stroke()
                pJS.canvas.ctx.closePath()
            }
        }
    }

    pJS.fn.interact.attractParticles = function (p1, p2) {
        /* condensed particles */
        var dx = p1.x - p2.x
        var dy = p1.y - p2.y
        var dist = Math.sqrt(dx * dx + dy * dy)

        if (dist <= pJS.particles.line_linked.distance) {
            var ax = dx / (pJS.particles.move.attract.rotateX * 1000)
            var ay = dy / (pJS.particles.move.attract.rotateY * 1000)

            p1.vx -= ax
            p1.vy -= ay

            p2.vx += ax
            p2.vy += ay
        }
    }

    pJS.fn.interact.bounceParticles = function (p1, p2) {
        var dx = p1.x - p2.x
        var dy = p1.y - p2.y
        var dist = Math.sqrt(dx * dx + dy * dy)
        var dist_p = p1.radius + p2.radius

        if (dist <= dist_p) {
            p1.vx = -p1.vx
            p1.vy = -p1.vy

            p2.vx = -p2.vx
            p2.vy = -p2.vy
        }
    }

    /* ---------- pJS functions - modes events ------------ */

    pJS.fn.modes.pushParticles = function (nb, pos) {
        pJS.tmp.pushing = true

        for (var i = 0; i < nb; i++) {
            pJS.particles.array.push(
                new pJS.fn.particle(
                    pJS.particles.color,
                    pJS.particles.opacity.value,
                    {
                        x: pos ? pos.pos_x : Math.random() * pJS.canvas.w,
                        y: pos ? pos.pos_y : Math.random() * pJS.canvas.h
                    }
                )
            )
            if (i == nb - 1) {
                if (!pJS.particles.move.enable) {
                    pJS.fn.particlesDraw()
                }
                pJS.tmp.pushing = false
            }
        }
    }

    pJS.fn.modes.removeParticles = function (nb) {
        pJS.particles.array.splice(0, nb)
        if (!pJS.particles.move.enable) {
            pJS.fn.particlesDraw()
        }
    }

    pJS.fn.modes.bubbleParticle = function (p) {
        /* on hover event */
        if (pJS.interactivity.events.onhover.enable && isInArray('bubble', pJS.interactivity.events.onhover.mode)) {
            var dx_mouse = p.x - pJS.interactivity.mouse.pos_x
            var dy_mouse = p.y - pJS.interactivity.mouse.pos_y
            var dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse)
            var ratio = 1 - dist_mouse / pJS.interactivity.modes.bubble.distance

            function init() {
                p.opacity_bubble = p.opacity
                p.radius_bubble = p.radius
            }

            /* mousemove - check ratio */
            if (dist_mouse <= pJS.interactivity.modes.bubble.distance) {
                if (ratio >= 0 && pJS.interactivity.status == 'mousemove') {
                    /* size */
                    if (pJS.interactivity.modes.bubble.size != pJS.particles.size.value) {
                        if (pJS.interactivity.modes.bubble.size > pJS.particles.size.value) {
                            var size = p.radius + (pJS.interactivity.modes.bubble.size * ratio)
                            if (size >= 0) {
                                p.radius_bubble = size
                            }
                        } else {
                            var dif = p.radius - pJS.interactivity.modes.bubble.size
                            var size = p.radius - (dif * ratio)
                            if (size > 0) {
                                p.radius_bubble = size
                            } else {
                                p.radius_bubble = 0
                            }
                        }
                    }

                    /* opacity */
                    if (pJS.interactivity.modes.bubble.opacity != pJS.particles.opacity.value) {
                        if (pJS.interactivity.modes.bubble.opacity > pJS.particles.opacity.value) {
                            var opacity = pJS.interactivity.modes.bubble.opacity * ratio
                            if (opacity > p.opacity && opacity <= pJS.interactivity.modes.bubble.opacity) {
                                p.opacity_bubble = opacity
                            }
                        } else {
                            var opacity = p.opacity - (pJS.particles.opacity.value - pJS.interactivity.modes.bubble.opacity) * ratio
                            if (opacity < p.opacity && opacity >= pJS.interactivity.modes.bubble.opacity) {
                                p.opacity_bubble = opacity
                            }
                        }
                    }
                }
            } else {
                init()
            }

            /* mouseleave */
            if (pJS.interactivity.status == 'mouseleave') {
                init()
            }
        }

        /* on click event */
        else if (pJS.interactivity.events.onclick.enable && isInArray('bubble', pJS.interactivity.events.onclick.mode)) {
            if (pJS.tmp.bubble_clicking) {
                var dx_mouse = p.x - pJS.interactivity.mouse.click_pos_x
                var dy_mouse = p.y - pJS.interactivity.mouse.click_pos_y
                var dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse)
                var time_spent = (new Date().getTime() - pJS.interactivity.mouse.click_time) / 1000

                if (time_spent > pJS.interactivity.modes.bubble.duration) {
                    pJS.tmp.bubble_duration_end = true
                }

                if (time_spent > pJS.interactivity.modes.bubble.duration * 2) {
                    pJS.tmp.bubble_clicking = false
                    pJS.tmp.bubble_duration_end = false
                }
            }

            function process(bubble_param, particles_param, p_obj_bubble, p_obj, id) {
                if (bubble_param != particles_param) {
                    if (!pJS.tmp.bubble_duration_end) {
                        if (dist_mouse <= pJS.interactivity.modes.bubble.distance) {
                            if (p_obj_bubble != undefined) var obj = p_obj_bubble
                            else var obj = p_obj
                            if (obj != bubble_param) {
                                var value = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration)
                                if (id == 'size') p.radius_bubble = value
                                if (id == 'opacity') p.opacity_bubble = value
                            }
                        } else {
                            if (id == 'size') p.radius_bubble = undefined
                            if (id == 'opacity') p.opacity_bubble = undefined
                        }
                    } else {
                        if (p_obj_bubble != undefined) {
                            var value_tmp = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration)
                            var dif = bubble_param - value_tmp
                            value = bubble_param + dif
                            if (id == 'size') p.radius_bubble = value
                            if (id == 'opacity') p.opacity_bubble = value
                        }
                    }
                }
            }

            if (pJS.tmp.bubble_clicking) {
                /* size */
                process(pJS.interactivity.modes.bubble.size, pJS.particles.size.value, p.radius_bubble, p.radius, 'size')
                /* opacity */
                process(pJS.interactivity.modes.bubble.opacity, pJS.particles.opacity.value, p.opacity_bubble, p.opacity, 'opacity')
            }
        }
    }

    pJS.fn.modes.repulseParticle = function (p) {
        if (pJS.interactivity.events.onhover.enable && isInArray('repulse', pJS.interactivity.events.onhover.mode) && pJS.interactivity.status == 'mousemove') {
            var dx_mouse = p.x - pJS.interactivity.mouse.pos_x
            var dy_mouse = p.y - pJS.interactivity.mouse.pos_y
            var dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse)

            var normVec = { x: dx_mouse / dist_mouse, y: dy_mouse / dist_mouse }
            var repulseRadius = pJS.interactivity.modes.repulse.distance
            var velocity = 100
            var repulseFactor = clamp((1 / repulseRadius) * (-1 * Math.pow(dist_mouse / repulseRadius, 2) + 1) * repulseRadius * velocity, 0, 50)

            var pos = {
                x: p.x + normVec.x * repulseFactor,
                y: p.y + normVec.y * repulseFactor
            }

            if (pJS.particles.move.out_mode == 'bounce') {
                if (pos.x - p.radius > 0 && pos.x + p.radius < pJS.canvas.w) p.x = pos.x
                if (pos.y - p.radius > 0 && pos.y + p.radius < pJS.canvas.h) p.y = pos.y
            } else {
                p.x = pos.x
                p.y = pos.y
            }
        } else if (pJS.interactivity.events.onclick.enable && isInArray('repulse', pJS.interactivity.events.onclick.mode)) {
            if (!pJS.tmp.repulse_finish) {
                pJS.tmp.repulse_count++
                if (pJS.tmp.repulse_count == pJS.particles.array.length) {
                    pJS.tmp.repulse_finish = true
                }
            }

            if (pJS.tmp.repulse_clicking) {
                var repulseRadius = Math.pow(pJS.interactivity.modes.repulse.distance / 6, 3)

                var dx = pJS.interactivity.mouse.click_pos_x - p.x
                var dy = pJS.interactivity.mouse.click_pos_y - p.y
                var d = dx * dx + dy * dy

                var force = -repulseRadius / d * 1

                function process() {
                    var f = Math.atan2(dy, dx)
                    p.vx = force * Math.cos(f)
                    p.vy = force * Math.sin(f)

                    if (pJS.particles.move.out_mode == 'bounce') {
                        var pos = {
                            x: p.x + p.vx,
                            y: p.y + p.vy
                        }
                        if (pos.x + p.radius > pJS.canvas.w) p.vx = -p.vx
                        else if (pos.x - p.radius < 0) p.vx = -p.vx
                        if (pos.y + p.radius > pJS.canvas.h) p.vy = -p.vy
                        else if (pos.y - p.radius < 0) p.vy = -p.vy
                    }
                }

                // default
                if (d <= repulseRadius) {
                    process()
                }
            } else {
                if (pJS.tmp.repulse_clicking == false) {
                    p.vx = p.vx_i
                    p.vy = p.vy_i
                }
            }
        }
    }

    pJS.fn.modes.grabParticle = function (p) {
        if (pJS.interactivity.events.onhover.enable && pJS.interactivity.status == 'mousemove') {
            var dx_mouse = p.x - pJS.interactivity.mouse.pos_x
            var dy_mouse = p.y - pJS.interactivity.mouse.pos_y
            var dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse)

            /* draw a line between the cursor and the particle if the distance between them is under the config distance */
            if (dist_mouse <= pJS.interactivity.modes.grab.distance) {
                var opacity_line = pJS.interactivity.modes.grab.line_linked.opacity - (dist_mouse / (1 / pJS.interactivity.modes.grab.line_linked.opacity)) / pJS.interactivity.modes.grab.distance

                if (opacity_line > 0) {
                    /* style */
                    var color_line = pJS.particles.line_linked.color_rgb_line
                    pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')'
                    pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width
                    // pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

                    /* path */
                    pJS.canvas.ctx.beginPath()
                    pJS.canvas.ctx.moveTo(p.x, p.y)
                    pJS.canvas.ctx.lineTo(pJS.interactivity.mouse.pos_x, pJS.interactivity.mouse.pos_y)
                    pJS.canvas.ctx.stroke()
                    pJS.canvas.ctx.closePath()
                }
            }
        }
    }

    /* ---------- pJS functions - vendors ------------ */

    pJS.fn.vendors.eventsListeners = function () {
        /* events target element */
        if (pJS.interactivity.detect_on == 'window') {
            pJS.interactivity.el = window
        } else {
            pJS.interactivity.el = pJS.canvas.el
        }

        /* detect mouse pos - on hover / click event */
        if (pJS.interactivity.events.onhover.enable || pJS.interactivity.events.onclick.enable) {
            /* el on mousemove */
            pJS.interactivity.el.addEventListener('mousemove', function (e) {
                if (pJS.interactivity.el == window) {
                    var pos_x = e.clientX
                    var pos_y = e.clientY
                } else {
                    var pos_x = e.offsetX || e.clientX
                    var pos_y = e.offsetY || e.clientY
                }

                pJS.interactivity.mouse.pos_x = pos_x
                pJS.interactivity.mouse.pos_y = pos_y

                if (pJS.tmp.retina) {
                    pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio
                    pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio
                }

                pJS.interactivity.status = 'mousemove'
            })

            /* el on onmouseleave */
            pJS.interactivity.el.addEventListener('mouseleave', function (e) {
                pJS.interactivity.mouse.pos_x = null
                pJS.interactivity.mouse.pos_y = null
                pJS.interactivity.status = 'mouseleave'
            })
        }

        /* on click event */
        if (pJS.interactivity.events.onclick.enable) {
            pJS.interactivity.el.addEventListener('click', function () {
                pJS.interactivity.mouse.click_pos_x = pJS.interactivity.mouse.pos_x
                pJS.interactivity.mouse.click_pos_y = pJS.interactivity.mouse.pos_y
                pJS.interactivity.mouse.click_time = new Date().getTime()

                if (pJS.interactivity.events.onclick.enable) {
                    switch (pJS.interactivity.events.onclick.mode) {
                        case 'push':
                            if (pJS.particles.move.enable) {
                                pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse)
                            } else {
                                if (pJS.interactivity.modes.push.particles_nb == 1) {
                                    pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse)
                                } else if (pJS.interactivity.modes.push.particles_nb > 1) {
                                    pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb)
                                }
                            }
                            break

                        case 'remove':
                            pJS.fn.modes.removeParticles(pJS.interactivity.modes.remove.particles_nb)
                            break

                        case 'bubble':
                            pJS.tmp.bubble_clicking = true
                            break

                        case 'repulse':
                            pJS.tmp.repulse_clicking = true
                            pJS.tmp.repulse_count = 0
                            pJS.tmp.repulse_finish = false
                            setTimeout(function () {
                                pJS.tmp.repulse_clicking = false
                            }, pJS.interactivity.modes.repulse.duration * 1000)
                            break
                    }
                }
            })
        }
    }

    pJS.fn.vendors.densityAutoParticles = function () {
        if (pJS.particles.number.density.enable) {
            /* calc area */
            var area = pJS.canvas.el.width * pJS.canvas.el.height / 1000
            if (pJS.tmp.retina) {
                area = area / (pJS.canvas.pxratio * 2)
            }

            /* calc number of particles based on density area */
            var nb_particles = area * pJS.particles.number.value / pJS.particles.number.density.value_area

            /* add or remove X particles */
            var missing_particles = pJS.particles.array.length - nb_particles
            if (missing_particles < 0) pJS.fn.modes.pushParticles(Math.abs(missing_particles))
            else pJS.fn.modes.removeParticles(missing_particles)
        }
    }

    pJS.fn.vendors.checkOverlap = function (p1, position) {
        for (var i = 0; i < pJS.particles.array.length; i++) {
            var p2 = pJS.particles.array[i]

            var dx = p1.x - p2.x
            var dy = p1.y - p2.y
            var dist = Math.sqrt(dx * dx + dy * dy)

            if (dist <= p1.radius + p2.radius) {
                p1.x = position ? position.x : Math.random() * pJS.canvas.w
                p1.y = position ? position.y : Math.random() * pJS.canvas.h
                pJS.fn.vendors.checkOverlap(p1)
            }
        }
    }

    pJS.fn.vendors.createSvgImg = function (p) {
        /* set color to svg element */
        var svgXml = pJS.tmp.source_svg
        var rgbHex = /#([0-9A-F]{3,6})/gi
        var coloredSvgXml = svgXml.replace(rgbHex, function (m, r, g, b) {
            if (p.color.rgb) {
                var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + p.opacity + ')'
            } else {
                var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + p.opacity + ')'
            }
            return color_value
        })

        /* prepare to create img with colored svg */
        var svg = new Blob([coloredSvgXml], { type: 'image/svg+xml;charset=utf-8' })
        var DOMURL = window.URL || window.webkitURL || window
        var url = DOMURL.createObjectURL(svg)

        /* create particle img obj */
        var img = new Image()
        img.addEventListener('load', function () {
            p.img.obj = img
            p.img.loaded = true
            DOMURL.revokeObjectURL(url)
            pJS.tmp.count_svg++
        })
        img.src = url
    }

    pJS.fn.vendors.destroypJS = function () {
        cancelAnimationFrame(pJS.fn.drawAnimFrame)
        canvas_el.remove()
        pJSDom = null
    }

    pJS.fn.vendors.drawShape = function (c, startX, startY, sideLength, sideCountNumerator, sideCountDenominator) {
        // By Programming Thomas - https://programmingthomas.wordpress.com/2013/04/03/n-sided-shapes/
        var sideCount = sideCountNumerator * sideCountDenominator
        var decimalSides = sideCountNumerator / sideCountDenominator
        var interiorAngleDegrees = (180 * (decimalSides - 2)) / decimalSides
        var interiorAngle = Math.PI - Math.PI * interiorAngleDegrees / 180 // convert to radians
        c.save()
        c.beginPath()
        c.translate(startX, startY)
        c.moveTo(0, 0)
        for (var i = 0; i < sideCount; i++) {
            c.lineTo(sideLength, 0)
            c.translate(sideLength, 0)
            c.rotate(interiorAngle)
        }
        // c.stroke();
        c.fill()
        c.restore()
    }

    pJS.fn.vendors.exportImg = function () {
        window.open(pJS.canvas.el.toDataURL('image/png'), '_blank')
    }

    pJS.fn.vendors.loadImg = function (type) {
        pJS.tmp.img_error = undefined

        if (pJS.particles.shape.image.src != '') {
            if (type == 'svg') {
                var xhr = new XMLHttpRequest()
                xhr.open('GET', pJS.particles.shape.image.src)
                xhr.onreadystatechange = function (data) {
                    if (xhr.readyState == 4) {
                        if (xhr.status == 200) {
                            pJS.tmp.source_svg = data.currentTarget.response
                            pJS.fn.vendors.checkBeforeDraw()
                        } else {
                            console.log('Error pJS - Image not found')
                            pJS.tmp.img_error = true
                        }
                    }
                }
                xhr.send()
            } else {
                var img = new Image()
                img.addEventListener('load', function () {
                    pJS.tmp.img_obj = img
                    pJS.fn.vendors.checkBeforeDraw()
                })
                img.src = pJS.particles.shape.image.src
            }
        } else {
            console.log('Error pJS - No image.src')
            pJS.tmp.img_error = true
        }
    }

    pJS.fn.vendors.draw = function () {
        if (pJS.particles.shape.type == 'image') {
            if (pJS.tmp.img_type == 'svg') {
                if (pJS.tmp.count_svg >= pJS.particles.number.value) {
                    pJS.fn.particlesDraw()
                    if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame)
                    else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw)
                } else {

                    if (!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw)
                }
            } else {
                if (pJS.tmp.img_obj != undefined) {
                    pJS.fn.particlesDraw()
                    if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame)
                    else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw)
                } else {
                    if (!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw)
                }
            }
        } else {
            pJS.fn.particlesDraw()
            if (!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame)
            else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw)
        }
    }

    pJS.fn.vendors.checkBeforeDraw = function () {

        if (pJS.particles.shape.type == 'image') {
            if (pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg == undefined) {
                pJS.tmp.checkAnimFrame = requestAnimFrame(check)
            } else {

                cancelRequestAnimFrame(pJS.tmp.checkAnimFrame)
                if (!pJS.tmp.img_error) {
                    pJS.fn.vendors.init()
                    pJS.fn.vendors.draw()
                }
            }
        } else {
            pJS.fn.vendors.init()
            pJS.fn.vendors.draw()
        }
    }

    pJS.fn.vendors.init = function () {
        /* init canvas + particles */
        pJS.fn.retinaInit()
        pJS.fn.canvasInit()
        pJS.fn.canvasSize()
        pJS.fn.canvasPaint()
        pJS.fn.particlesCreate()
        pJS.fn.vendors.densityAutoParticles()

        /* particles.line_linked - convert hex colors to rgb */
        pJS.particles.line_linked.color_rgb_line = hexToRgb(pJS.particles.line_linked.color)
    }

    pJS.fn.vendors.start = function () {
        if (isInArray('image', pJS.particles.shape.type)) {
            pJS.tmp.img_type = pJS.particles.shape.image.src.substr(pJS.particles.shape.image.src.length - 3)
            pJS.fn.vendors.loadImg(pJS.tmp.img_type)
        } else {
            pJS.fn.vendors.checkBeforeDraw()
        }
    }

    /* ---------- pJS - start ------------ */

    pJS.fn.vendors.eventsListeners()

    pJS.fn.vendors.start()
}

const checkKeys = (storeObj, newObj) => {
    for (const key in newObj) {

        if (typeof newObj[key] === 'object') {
            storeObj[key] = checkKeys(storeObj[key], newObj[key])
        } else {
            storeObj[key] = newObj[key]
        }
    }
    return storeObj
}

Object.deepExtend = function (destination, source) {
    checkKeys(destination, source)
}

window.requestAnimFrame = (function () {
    return window.requestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        window.oRequestAnimationFrame ||
        window.msRequestAnimationFrame ||
        function (callback) {
            window.setTimeout(callback, 1000 / 60)
        }
})()

window.cancelRequestAnimFrame = (function () {
    return window.cancelAnimationFrame ||
        window.webkitCancelRequestAnimationFrame ||
        window.mozCancelRequestAnimationFrame ||
        window.oCancelRequestAnimationFrame ||
        window.msCancelRequestAnimationFrame ||
        clearTimeout
})()

function hexToRgb(hex) {
    // By Tim Down - http://stackoverflow.com/a/5624139/3493650
    // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
    var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i
    hex = hex.replace(shorthandRegex, function (m, r, g, b) {
        return r + r + g + g + b + b
    })
    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null
};

function clamp(number, min, max) {
    return Math.min(Math.max(number, min), max)
};

function isInArray(value, array) {
    return array.indexOf(value) > -1
}

/* ---------- particles.js functions - start ------------ */

window.pJSDom = []

window.particlesJS = function (tag_id, params) {

    if (!tag_id) {
        tag_id = docuemnt.getElementById('particles-js')
    }

    /* pJS elements */
    var pJS_tag = tag_id
    var pJS_canvas_class = 'particles-js-canvas-el'
    var exist_canvas = pJS_tag.getElementsByClassName(pJS_canvas_class)

    /* remove canvas if exists into the pJS target tag */
    if (exist_canvas.length) {
        while (exist_canvas.length > 0) {
            pJS_tag.removeChild(exist_canvas[0])
        }
    }

    /* create canvas element */
    var canvas_el = document.createElement('canvas')
    canvas_el.className = pJS_canvas_class

    /* set size canvas */
    canvas_el.style.width = '100%'
    canvas_el.style.height = '100%'

    /* append canvas */
    var canvas = tag_id.appendChild(canvas_el)

    /* launch particle.js */
    if (canvas != null) {
        pJSDom.push(new pJS(tag_id, params))
    }
}

window.particlesJS.load = function (tag_id, path_config_json, callback) {
    /* load json config */
    var xhr = new XMLHttpRequest()
    xhr.open('GET', path_config_json)
    xhr.onreadystatechange = function (data) {
        if (xhr.readyState == 4) {
            if (xhr.status == 200) {
                var params = JSON.parse(data.currentTarget.response)
                window.particlesJS(tag_id, params)
                if (callback) callback()
            } else {
                console.log('Error pJS - XMLHttpRequest status: ' + xhr.status)
                console.log('Error pJS - File config not found')
            }
        }
    }
    xhr.send()
}
